The Ruling on Praying in a Short Garment That Exposes the 'Awrah

Question:
The questioner asks: Is it permissible to wear trousers, known as shorts, that end above the mid-calf, where the awrah (the part of the body that must be covered) may become exposed during bowing or prostration?

Answer:
It is not permissible to wear clothing that does not cover the awrah (the part of the body that must be covered), such that the awrah becomes exposed at times during bowing or prostration. This is not permissible, and his prayer is invalid; his prayer is not valid, because covering the awrah is a condition for the validity of the prayer.